2) cracked roof
裂隙岩石顶板
1.
The elementary equations for buckling of cracked roof beam are established by means of freebody method and Castigliano's principle.
采用无拉力岩石梁的力学解析模型，根据自由刚体法及卡氏定理建立了层状裂隙岩石顶板失稳问题的基本求解方程。
3) Crack of top coal
顶煤裂隙
4) sheet crack
板状裂隙
6) roof breaking
顶板断裂
1.
Based on caculation of three-dimensional finite element method and field ob-servatiOn results,this paper studies the antielasticity mechanism,affecting factors and the re-lation between abutment characteristics and roof breaking and discusses the engineering signifi-cance of anti-elasticity.
借助三维非线性有限元计算和现场实测结果，对“反弹”机理、影响因素、显现特征与顶板断裂的关系进行了探讨，并对其工程意义作了评述。
补充资料：冰川大裂隙
冰川大裂隙
一;分广、、·;，兮}‘一，;月长之fJ…砂劝 程形摄
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条